F-brake



FIG. 1 is an upper left perspective view of the F-brake including an illustration of a representative environment of the design shown in broken lines, the environmental detail in broken lines being disclaimed as forming no part of this design;

FIG. 2 is a right side perspective view of the design;

FIG. 3 is a right side elevation view of the design;

FIG. 4 a left side elevation view of the design;

FIG. 5 is a front elevation view of the design;

FIG. 6 is a rear elevation view of the design;

FIG. 7 is a top view of the design; and,

FIG. 8 is a bottom view of the design. 

CLAIM The ornamental design for an F-brake, as shown and described. 